Print head for micro-deposition of bio-molecules

Abstract

A print head for depositing molecular liquids on a substrate comprising: a block of prezoelectic material including at least one void passing through the block and first and second electrodes respectively coating the void and the block, such that application of a voltage between the electrodes produces a radial force to constrict the void and eject liquid contained in the void.

What is claimed is:  
     
         1 . A print head for depositing molecular liquids on a substrate comprising: 
 a block of piezoelectic material including at least one void passing through said block; and    first and second electrodes respectively coating said void and said block, such that application of a voltage between said electrodes produces a radial force to constrict said void and eject liquid contained in said void.    
     
     
         2 . The print head of  claim 1  wherein said at least one void contains a glass or plastic capillary tube for containing a molecular liquid to be ejected.  
     
     
         3 . The print head of  claim 1  including a plate on said block having an orifice aligned with said at least one void.  
     
     
         4 . The print head of  claim 1  including a tube connected to said orifice for supplying molecular liquid to said at least one void in said block.  
     
     
         5 . The print head of  claim 1  wherein said block is made of lead zirconate titonate material.  
     
     
         6 . The print head of  claim 1  wherein said block includes a linear array spaced of voids passing through said block.  
     
     
         7 . The print head of  claim 1  wherein said block includes an array of spaced voids passing through said block.